Feasibility study and analysis on the improvement of mechanical overspeed protection device of a thermal power turbine unit

Qi, junfeng; Lv, Baoyu; Yu, Xianbo; Wu, Xi

doi:10.1117/12.2638574

Cited by 2 publications

(2 citation statements)

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“…Mechanical overspeed protection devices usually use centrifugal force at high rotational speeds to drive the mechanism to generate tripping action. However, mechanical overspeed protection has the situation of "mal-operation" or "refused operation of protection" 3 , which is more evident in traditional single-plunger type overspeed protection mechanisms. Compared with the traditional single-plunger type, the double-plunger type can act more promptly and accurately when the unit is running overspeed has a more stable performance at higher speed and it can adjust the trip speed by changing the position of the outer plunger.…”

Section: Introductionmentioning

confidence: 99%

Dynamics analysis of a double-plungers type turbine overspeed protection mechanism

Jiang

Wang

Cheng

et al. 2023

Preprint

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A double-plunger type overspeed protection mechanism has an excellent performance in turbine overspeed protection, but the complicated operating principle thereof makes long-term use difficult. In this study, a dynamics model is established to explain the relationship between the motion state and the force situation. Through the analysis of the dynamics model, the specific process of the linked plunger for achieving overspeed protection with tripping action is determined, and the motion law of the inner and outer plungers is clarified. Additionally, the complete solution method and calculation procedure for the tripping speed of the submerged plunger are established, and the specific process for solving the relevant equations with numerical iteration is clarified. Finally, a rigid-flexible coupling virtual prototype model is established, and the entire process of plunger motion is simulated with dynamics simulation to verify the correctness of the plunger action mechanism in the theoretical model.

show abstract

Section: Introductionmentioning

confidence: 99%

Dynamics analysis of a double-plungers type turbine overspeed protection mechanism

Jiang

Wang

Cheng

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

“…Mechanical overspeed protection devices usually use centrifugal force at high rotational speeds to drive the mechanism to generate tripping action. However, mechanical overspeed protection has the situation of "mal-operation" or "refused operation of protection" [6], which is more evident in traditional single-plunger type overspeed protection mechanisms. Compared with the traditional single-plunger type, the double-plunger type can act more promptly and accurately when the unit is running overspeed, has a more stable performance at higher speeds, and can adjust the trip speed by changing the position of the outer plunger.…”

Section: Introductionmentioning

confidence: 99%

Dynamics Analysis of a Double-Plunger-Type Turbine Overspeed Protection Mechanism

Jiang,

Wang,

Cheng

et al. 2023

Applied Sciences

View full text Add to dashboard Cite

A double-plunger type overspeed protection mechanism has excellent performance in turbine overspeed protection, but the complicated operating principle thereof makes long-term use difficult. In this study, a dynamic model is established to explain the relationship between the motion state and the force situation. Through the analysis of the dynamic model, the specific process of the linked plunger for achieving overspeed protection with tripping action is determined, and the motion law of the inner and outer plungers is clarified. Additionally, the complete solution method and calculation procedure for the tripping speed of the submerged plunger are established, and the specific process for solving the relevant equations with numerical iteration is clarified. Finally, a rigid-flexible coupling virtual prototype model is established, which validates the conclusion that initial eccentric distance and spring stiffness are key factors affecting tripping speed and the motion process of inner and outer plungers.

show abstract

Feasibility study and analysis on the improvement of mechanical overspeed protection device of a thermal power turbine unit

Cited by 2 publications

References 0 publications

Dynamics analysis of a double-plungers type turbine overspeed protection mechanism

Dynamics analysis of a double-plungers type turbine overspeed protection mechanism

Dynamics Analysis of a Double-Plunger-Type Turbine Overspeed Protection Mechanism

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